<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>

      <!--active的值必须是数字类型 number -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品照片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- Tab -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <!--v-model 绑定值，选中选项卡的 name默认是第一个值 -->
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeLTabeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类">
              <div class="block">
                <el-cascader
                  v-model="addForm.goods_cat"
                  :options="cateList"
                  :props="cateProps"
                  @change="handleChange"
                ></el-cascader>
              </div>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTabData"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  :label="val"
                  v-for="(val, index) in item.attr_vals"
                  :key="index"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTabData"
              :key="item.attr_id"
              :tab-position="'left'"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品照片" name="3">
            <!-- action：上传图片的服务器地址  -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :file-list="fileList"
              list-type="picture"
              :headers="headersObje"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="addBtn" @click="addGoods"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewDialogVisible"
      width="50%"
    >
      <img :src="previewPath" alt="" width="100%" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  name: 'Add',
  data() {
    return {
      // 商品分类数据
      cateList: [],
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_number: 0,
        goods_weight: 0,
        // 联动的id值数组
        goods_cat: [],
        // 图片路径
        pics: [],
        // 详情描述
        goods_introduce: '',
        // 静态参数和动态参数
        attrs: [],
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' },
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' },
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' },
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' },
        ],
        goods_cat: [{ required: true, message: '请选择商品', trigger: 'blur' }],
      },
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
      },
      // 动态参数
      manyTabData: [],
      // 静态参数 参数属性
      onlyTabData: [],
      // 上传图片的地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 上传图片的请求头
      headersObje: {
        Authorization: window.sessionStorage.getItem('token'),
      },
      // 上传图片列表
      fileList: [],
      // 预览图片路径
      previewPath: '',
      // 控制预览对话框
      previewDialogVisible: false,
    }
  },
  created() {
    this.getCatList()
  },
  methods: {
    async getCatList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        this.$message.error('请求商品分类数据失败！')
      }
      this.cateList = res.data
    },
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    // 切换标签之前的钩子，若返回 false 或者返回 Promise 且被 reject，则阻止切换。
    beforeLTabeave(activeName, oldActiveName) {
      // console.log('即将进入的标签名称：', activeName)
      // console.log('即将离开的标签名称：', oldActiveName)
      if (this.addForm.goods_cat.length !== 3) {
        this.$message.info('请选择商品分类!')
        return false
      }
    },
    // 获取商品动态参数数据
    async tabClicked() {
      // console.log(this.activeIndex)
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: 'many' } }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败！')
        }

        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length !== 0 ? item.attr_vals.split(' ') : []
        })
        this.manyTabData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: 'only' } }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性列表失败！')
        }

        this.onlyTabData = res.data
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewDialogVisible = true
    },
    // 处理图片的移除
    handleRemove(file) {
      const img = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex((x) => x.pic === img)
      this.addForm.pics.splice(i, 1)
    },
    // 文件上传成功时的钩子
    handleSuccess(response) {
      // 1,拼接一个图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 2,把图片对象push到pics数组中
      this.addForm.pics.push(picInfo)
    },
    // 添加商品
    async addGoods() {
      // console.log(this.addForm)
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error('请填写必填项')
        }
        // 应为多级联动v-mode 绑定的必须是数组 如果直接修改成字符串会报错
        // 通过 lodash 的 cloneDeep进行深度拷贝
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 动态参数项
        this.manyTabData.forEach((item) => {
          const formInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(),
          }
          this.addForm.attrs.push(formInfo)
        })
        // 金泰参数
        this.onlyTabData.forEach((item) => {
          const formInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals,
          }
          this.addForm.attrs.push(formInfo)
        })
        form.attrs = this.addForm.attrs
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败！')
        }
        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
      })
    },
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    },
  },
}
</script>

<style lang="less" scoped>
.el-steps {
  margin: 15px 0;
}
.el-step__title {
  font-size: 12px;
}
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.addBtn {
  margin: 15px 0;
}
</style>
